Foot-power motor.



HARGROVE.

FOOT POWER MOTOR.

APPLICATION FILED NOV.11, 1907.

Patented Dec. 7, 1909.

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Attorney I vento Witnesse W. HARGROVE.

FOOT POWER MOTOR. APPLICATION FILED NOV. 11, 1907.

9425556, I Patented Dec. 7, 1909.

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FREQ...

Witnesses Attorneys W. HARGROVE.

FOOT POWER MOTOR.

APPLICATION FILED NOV. 11, 1907.

Patented. Dec. 7, 1909.

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iii i Attorneys M H a m S 1.

e l .l H! MIMI n 6 llllil- H I W. HARGROVE.

' FOOT POWER MOTOR. APPLICATION FILED NOV. 11, 1907.

Patented Dec. '7, 1909.

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WILLIAM HARGBOVE, OF IHIONTREAL, QUEBEC, CANADA, ASSIGNO PHILIP ARMSTRONG ELLIOTT, OF M FOOT-PONEB MOTOR.

Application filed November 11, 1907.

Specification of Letters Patent.

Serial No. 101,628.

T 0 all whom it may conccrn Be it known that I, 'Wninmzsr Hanenovn, a subject of the King of Great Britain, residing in the city and district of Montreal, in the Province of Quebec, Canada, have invented certain new and useful Improvements in Foot-Power lilotors; and i do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to motors which put springs under pressure by the depression of treadles, the said springs continuing the action of said treadles in actuating a shaft or shafts and band saw or other mechanism adapted to operate on wood or other materials and the said invention consists in the construction and combination of parts hereinafter more particularly set forth and claimed.

In the drawings: Figure 1 is a side elevation of the machine to which the invention is applied; Fig. 2 is a left hand end elevation of the same; Fig. 3 is a plan view of the driving mechanism; Fig. & is a detail elevation of one of the driving sprockets and its ratchet clutch mechanism; Fig. 5 is a side elevation of a sprocket wheel and its ratchet drive; Fig. 6 is a longitudinal section of Fig. 5; Fig. 7 is a plan view of one of the power springs detached; and Fig. 8 is a detail sectional view showing the mechanism for locking the power sprin 1 designates a frame in which is ournaled a power shaft 6 on which are clamped collars 7, sprocket wheels 8 being loosely mounted on said shaft between said collars, which in turn are provided with ratchets 9. Spring pressed pawls 10 are mounted on said sprocket wheels 8 and are adapted to engage and lock with the teeth of ratchets 9, when the sprocket wheels are rotated in the direction of the arrow, and to slide over or ass over the teeth of said ratchets when the sprocket wheels are rotated in the reverse direction.

11 designates sprocket chains, which pass over the sprocket wheels 8 in opposite directions and are attached at their opposite ends to a pedal 12, mounted in the frame 1, and to spring actuated arms 13, mounted at opposite sides in said frame on the underside of the top thereof. Said lever arms 13 have pintles 1 1 loosely ournaled therein, said pinta-tes the shaft 6 in a tionarily mounted ther E OF ONE-HALF TO ONTREAL, CANADA.

Patented Dec. tees.

'atchets 15 staeon, said pintles 14 being journaled in brackets 16 fixed. to the frame 1 aforesaid.

17 designates spring pressed pawls mounted upon said lever arms 13 and which are adapted to and by reason of such 7 to engage ratchets engagement turn or actuate the lever arms 13 when said ratchets,

being in engagement with said p awls, are rotated. actuating said arms 13.

18 designates the spiral springs for Said springs for a part of their length encircle said pintles 14:

and are attached thereto on manner that when in such turned by the ratchets the sides thereof the pintles are which in turn are turned by the lever arms 13, in one direction the springs will be the springs unwind wound tight and when they will turn the pintles 1 and the ratchets 15 which in turn will actuate the lever nates pawls mounted uponsai to engage said ratchets 15 and and adapted arms '13. 19 desigl brackets 16 hold the same still or keep them from rotating, thus providing a means for adjusting the tension of the springs 18.

Each pawl or dog 19 holds its ratchet 15 against rotation while the pawl 17 of said ratchet travels over one latter to get a new ratchet more or less by or more teeth of the hold for turning the step by step motlon and so putting the said spring under tension.

Without the dog 19,

back the ratchet during the spring would turn this shifting of the pawls 17 to a new position thereby losing tension thus gained. The office make sure that the said at least partly offsetting the increase of the dogs 19 is to ratchets shall never turn backward while these dogs are in operative position.

The operation of the machine is as follows: The pedal 12 is depressed, and thereby rotates the left hand sprocket wheel 8 in the direction opposi by the arrow, F g. 1, sprocket wheel in the to to that indicated and the right hand opposite direction.

he pawl 10 of the right hand sprocket wheel engages rection, while the pawl the ratchet 9 and counter-clockwise dithereby ro- 10 of the left hand the arms 12 are swung inwardly, and their respective springs brought under tension.

The tension of the sprlngs acting through the arms 13 and attache d sprocket chains 11,

rotates the sprocket wheels 8 in their reverse directions, thus driving the shaft 6 in the same direction, but by the left hand sprocket wheel and its pawl and ratchet mechanism, while the right hand sprocket wheel runs free. The tension of the spring acting on the sprocket chain passing over the right hand sprocket wheel which runs free as the pedal rises, therefore acts to raise the pedal, while its companion drives the shaft 6. Thus the same power used to depress the pedal for driving the machine may be used as spring tension for continuing the drive as the pedal is raised.

Many changes in the detail construction of the several parts, in their several combinations, many rearrangements of the same and various other applications may be had without in any way departing from the field and scope of the invention, and it is meant to include all such within this application, wherein only the preferred form of construction has been illustrated.

Having thus fully described my invention, what I claim as new, and desire to se cure by Letters Patent, is

l. The combination of a frame and a shaft mounted therein, with sprocket wheels loosely supported on said shaft, one way clutch connections between said sprocket wheels and the said shaft, a treadle, chains connected at one end to the treadle and pass ing over the said sprocket wheels in opposite directions, arms to which the other ends l l l of the chains are connected, pintles on which the said arms are loosely mounted, means for rotatably supporting the pintles, coiled springs each connected at one end to the frame and at the other end to a pintle, a pair of ratchets each of which turns with one of said pintles, a pair of pawls each of which is pivoted to one of said arms and engages the proximate ratchet to feed the same and a pairof retaining pawls or dogs each of which engages one of these ratchets substantially as set forth.

2. In combination with a shaft and a treadle, a rocking arm, a chain connecting said treadle to said arm and engaging a sprocket wheel on said shaft, a ratchet mounted on said shaft, a spring pressed pawl engaging said ratchet mounted on said sprocket wheel, a rocking pintle, a spring attached thereto and tending to raise said treadle, a pawl and ratchet making connection between said pintle and said arm, and a dog adapted to engage said ratchet at will to hold it in one position while the pawl is shifted over one or more teeth for a new hold, thus providing for the adjustment of the tension of said spring, substantially as set forth.

In witnesses whereof I have hereunto set my hand in the presence of two witnesses.

WVILLIAM HARGROVE.

Witnesses EUGENE M. SLINEY, V. S. BABOOCK. 

